Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['267', '71', 'k', '347', 'k', '165', 'o', 'b', 'p', 'g', 'w']

1, 2, 3, 4, 5, 6, 7